Mandrin de perceuse 432mm Hss M35 Cobalt Spiral Groove Step Drill Bits 1/4 '' Hex Handle 1pcs

High-speed steel M35 step drill bit, superior quality and more durable than the HSS 4241 step drill bit. The high-speed steel and titanium coating ensure extreme durability; it will remain like new and shiny for years to come. Hex shank diameter: 6.35 mm. No center punch required; unlike ordinary twist drill bits, it is not easily broken and can be used for deburring, chamfering, and opening holes. High-speed steel M35 step drill bit, superior quality and more durable than the HSS 4241 step drill bit. As effective as an excellent cobalt drill bit. Made of super-strong HSS steel for durability and a long service life. The fixed drill tip allows for fast and smooth drilling on steel plates, aluminum sheets, wood boards, plastic boards, etc. (the board must be thinner than the height of the step drill bits). Features: Material: High-speed steel, Co (HSS co M35) Surface treatment: Titanium coated Hex shank diameter: 6.35 mm / 1/4 Size: 4-32 mm (4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm); 15 steps Features: Titanium coating to reduce mites and heat. High-speed steel M35 step drill bit, higher quality and more durable than the HSS 4241 step drill bit. Effective punch, like an excellent cobalt drill bit. Very useful for drilling, especially holes in stainless steel, metals, plastics, and wood. Suitable for drilling holes in sheet metal, steel plate, aluminum plate, brass, or wood. A highly recommended tool to have on hand. Workshop Information on Drilling Stainless Steel Sheets: 1. Both a hand drill and a bench drill can be used when drilling stainless steel sheets. A hand drill can drill steel sheets less than 1 mm thick, while a bench drill can drill steel sheets 2 to 3 mm thick. 2. Low-speed drilling is necessary when drilling stainless steel sheets; a few hundred RPM is sufficient. 3. Please cool the drill during drilling to prolong its lifespan. A rotation speed of 250 to 400 RPM is recommended. Note: - When drilling, please wear appropriate protective gear to avoid wood chips. - Size is measured manually; there may be a 0 to 3 mm error, which is normal.